id:A134185 - OEIS Search Results

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Hankel transform of a transform of the central binomial coefficients A001405.

+0
2

1, 2, 0, -8, -32, -256, 0, 16384, 262144, 8388608, 0, -8589934592, -549755813888, -70368744177664, 0, 1152921504606846976, 295147905179352825856, 151115727451828646838272, 0, -39614081257132168796771975168 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Hankel transform of A134184.`
	FORMULA	`a(n)=((1/2-1/sqrt(2))cos(3pin/4)+(1/2+1/sqrt(2))cos(pin/4))2^ceiling(comb(n+1,2)/2)`
	CROSSREFS	`Sequence in context: A062134 A002909 A118437 this_sequence A013489 A013342 A109589` `Adjacent sequences: A134182 A134183 A134184 this_sequence A134186 A134187 A134188`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 11 2007`

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Last modified December 4 21:35 EST 2008. Contains 151309 sequences.

AT&T Labs Research